Why does my car use more fuel coasting in neutral than when in gear?

Your memory is bad. No car idles at 2300.

I looked today. Yep, you guys are right. I’m not a car guy. And I have a bad memory. My car idles somewhere between 600-800 RPM.

/Really can drive a stick like a maniac
//Very little mechanical intuition or know-how
///I’m an engineer, but chemical. Mechanical just confounds me. Electrons are easy. Gears are baffling.